From de630b9b78ad09d3092e6fff4629d8503693bdff Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bartek=20Iwa=C5=84czuk?= <biwanczuk@gmail.com>
Date: Thu, 6 Jul 2023 13:05:10 +0200
Subject: perf(node/async_hooks): optimize AsyncLocalStorage (#19729)

This makes the implementation of "AsyncLocalStorage" from
"node:async_hooks" 3.5x faster than before for noop benchmark
(measuring baseline overhead). It's still 3.5x slower than not
using `AsyncLocalStorage` and 1.64x slower than using
noop promise hooks.
---
 ext/node/lib.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'ext/node/lib.rs')

diff --git a/ext/node/lib.rs b/ext/node/lib.rs
index 6d496f001..a623eac11 100644
--- a/ext/node/lib.rs
+++ b/ext/node/lib.rs
@@ -138,6 +138,15 @@ fn op_is_any_arraybuffer(value: serde_v8::Value) -> bool {
   value.v8_value.is_array_buffer() || value.v8_value.is_shared_array_buffer()
 }
 
+#[op(fast)]
+fn op_node_is_promise_rejected(value: serde_v8::Value) -> bool {
+  let Ok(promise) = v8::Local::<v8::Promise>::try_from(value.v8_value) else {
+    return false;
+  };
+
+  promise.state() == v8::PromiseState::Rejected
+}
+
 deno_core::extension!(deno_node,
   deps = [ deno_io, deno_fs ],
   parameters = [P: NodePermissions],
@@ -233,6 +242,7 @@ deno_core::extension!(deno_node,
     ops::http::op_node_http_request<P>,
     op_node_build_os,
     op_is_any_arraybuffer,
+    op_node_is_promise_rejected,
     ops::require::op_require_init_paths,
     ops::require::op_require_node_module_paths<P>,
     ops::require::op_require_proxy_path,
-- 
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